← View Generic B2778 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B2778: B2778: Door Locks Actuator Circuit Malfunction

on 2021 Honda PASSPORT

Fix Cost
$100 - $300
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2021 Honda
PASSPORT
⚠️

Important for 2021 Honda PASSPORT Owners

Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does B2778 Mean on 2021 Honda PASSPORT?

The B2778 code indicates a malfunction in the door locks actuator circuit, which controls the operation of the door locks. This can cause issues with locking and unlocking the doors.
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Symptoms

  • • Door locks may not function properly
  • • or may not lock or unlock at all
  • • or may lock/unlock randomly.
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Common Causes

  • • Faulty door locks actuator
  • • wiring issue
  • • or a problem with the body control module.
🛠️

How to Fix B2778 on 2021 Honda PASSPORT

1. Check the wiring and connectors for damage or corrosion. 2. Test the door locks actuator for proper function. 3. Check the body control module for any fault codes. 4. Replace the faulty door locks actuator if necessary.

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Parts for 2021 Honda PASSPORT

Door locks actuator Shop ↗ Wiring harness Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with B2778

B2776 Sequential Code

B2776: Airbag System Fault

High
B2777 Sequential Code

B2777: Climate Control Fan Motor Malfunction

Medium
B2779 Sequential Code

B2779: Power Window Relay Circuit Malfunction

Medium
B2780 Sequential Code

B2780: Seat Position Sensor Circuit Malfunction

Medium

💡 Why These Codes Are Related:

  • • Similar Issues: Same root cause or component failure
  • • Related Problems: Often occur together due to system interactions
  • • Sequential Codes: Progressive failure stages or multiple sensors
  • • Same System: Components within the same automotive system